| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
0.9%
|
|
| 2010 | 1 |
0.9%
|
|
| 2011 | 21 |
19.6%
|
|
| 2012 | 84 |
78.5%
|
|
| 8888 | Doesn't Know | 0 |
0%
|
| Sysmiss | 1855 |